Heung co-founded Win's Entertainment with his elder brother Charles in the 1980s, which went on to become one of the most successful film studios in Hong Kong in the 1990s.

Jimmy Heung was one of the few local filmmakers who ventured into the mainland market in the 1990s. Most were discouraged by rampant piracy problems across the border at that time.

The Heung brothers went their separate ways later that decade. With Jimmy Heung focusing on the mainland, Charles Heung formed China Star Entertainment Group to continue making films in Hong Kong.(excerpted from SCMP)